My only comment was in response to 'creating a "clone" of the currently running operating system.' Which is not, in any sense, accurate.
What is shared, as you correctly point out (and I do not refute) is that kernel and devices are not virtualized per container. So you're absolutely right, it's not like a VM. And it does break down, but none of that has to do with the part where your statement is incorrect, which I've addressed and expanded upon.